If your version is older than 9.0, then no chance to open project created by windows version on Mac, as the project files (.wve & .wsve) and software are not interchangeable between the two operating systems because of the software architecture. As alternative, you can export the project to a video file first, such as .mp4 from windows version first. Then import the video to the project created by Filmora for Mac as input.
And for project made with 9.0, you can archive the project first then open in different operating systems.